Press



June 5, 1962 s. F. GARDNER 3,037,546

PRESS Filed March 8. 1960 4 Sheets-Sheet 1 INVENTOR.

fiiewar iEGardnen W I ig June 5, 1962 Filed March 8. 1960 S. F. GARDNERPRESS 4. Sheets-Sheet 2 IN V EN TOR.

Stewart Gardner a wan 2&3

June 5, 1962 s. F. GARDNER 3,037,546

PRESS Filed March 8. 1960 4 Sheets-Sheet 3 JNVENTOR.

43 SZzuarfGardnev;

United States Patent 3,037,546 PRESS Stewart F. Gardner, The StewartCoach Industries, Inc, Bristol, Ind. Filed Mar. 8, 1960, Ser. No. 13,498Claims. {CL 153-2) The present invention relates to a sheet metalforming press, and more particularly to such a press for forming bothinner and outer panels for doors.

In the manufacture of doors, such as doors for mobile homes, formed ofinner and outer panels flanged and connected along their edges toprovide a hollow shell which may have thermal insulation or the likeapplied therein, and with openings cut in the panels for insertion ofwindows and of latches .or locks, it has heretofore been a relativelyslow, expensive, and tedious operation to perform the various stepsnecessary for so forming the panels. The press of the present inventionreduces to one simple operation the several separate steps previouslyrequired, and by reason of the resulting simplification reduces thetime, labor, and costs involved to a minimum. To this end, the fixed andmovable parts of the press are provided with complementary diestructures which in one operation of the press perform all of thebending and cutting necessary to form the panel as desired. In addition,the press incorporates in its die parts elements or members selectivelyand alternatively attachable in different' positions so as to bend theinner and outer panels of the different respective forms thereof.Similarly, the two panels have corner portions of different shapes cuttherefrom. The cutting of the several corner portions is accomplished bycooperating shearing die blocks removably secured on the press bed andplaten as portions of the complementary die parts, the blocks beingreadily removed and replaced when the press is to operate upon an inneror outer panel after having been used to form the other panel. Thearrangement is such as to permit the use of at least one of the shearingdie blocks in a plurality of positions so as to cooperate in the cuttingoff of either square or triangular corner portions, if desired.

In the cutting of apertures, such as a window aperture, or a door lockaperture, in a panel,'cooperable shearingdie elements are provided onthe bed and platen for preferably simultaneous cutting of all sides ofthe aperture. To facilitate the shearing or cutting action, and reducethe power required to cut the desired portions from the panel or sheet,at least certain of the shearing die elements have cutting edges formedwith a slight curve so that the movement of the cooperating shearelements toward each other with the sheet therebetween results in aprogressive cutting or shearing of the panel from the point or points atwhich the curved cutting edges first contact the sheet. In thisconnection, at least certain of the apertures must be cut in oppositeportions of the two panels as they are respectively and similarlypositioned in the press, since in assembly one of the panels must bereversed from its forming position in order .to engage properly with theother, and registration of corresponding apertures would not occur ifthe apertures were not cut as explained. The invention provides easilytransposable cutting means to allow the relative reversal of location ofthe openings.

It is accordingly an object of the invention to provide a sheet metalforming press for forming different shapes of panels assemblableto-provide a hollow door construction in which either panel may beformed with equal facility, and which is adaptable with a minimumexpenditure of effort and time to form either type of panel.

Another object is the provision of a panel-forming press havingcomplementary die parts for bending edge por- 'ice tions of a metalsheet into either upstanding fianges or rebent' flanges, the die partincluding die members selectively securable in one or the other of saiddie parts to provide for the formation of either an upstanding flange orrebent flanges thereby.

Another object is the provision of a sheet metal forming presshaving'complementary relatively movable die structures includingshearing die block means for cutting corner portions from a sheet orpanel which employ alternate sets of such means for cutting eithertriangular or square corner portions from the panel; and also theoptional provision of shear blocks employable in either set of die blockmeans by selective securement of such blocks in either of two positionsthereof.

A further object of the invention is theprovision of complementaryshearing die elements in cooperating relatively movable die parts forcutting portions from a panel to provide openings therein, in which atleast certain of the shearing elements are formed with curved cuttingedges to facilitate the cutting of the apertures by effecting aprogressive shear.

It is another object to provide readily reversible means for effectingrelatively reverse formation of panels in relatively movablecomplementary die means.

It is also an object of the invention to provide a sheet metal formingpress including novel ejector means for facilitating removal of theformed panel from the press.

Other and further objects, advantages, and features of the inventionwill be apparent to those skilled in the art from the following detaileddescription, taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a front elevational view of a press according to theinvention, in its open or loading position;

FIG. 2 is a fragmentary View similar to FIG. 1, but showing the pressin'its closed or forming position;

FIG. 3 is a horizontal sectional view taken substantially as indicatedby the line 3-3 of FIG. 1, showing the movable platen of the press inplan;

FIG. 4 is a perspective view showing the two panels prior to assembly;

FIG. 5 is an enlarged fragmentary detail view in perspective of onecorner-cutting die construction of the press in the open positionthereof;

FIG. 6 is a view of the construction of FIG. 5 in the forming positionof the press;

FIG. 7 is an enlarged plan view of the platen-mounted portion of anothercorner-cutting die structure;

FIG. 8 is an enlarged perspective view of another corner-cutting dieconstruction of the press in the open position thereof;

FIG. 9 is an enlarged cross-sectional view taken substantially asindicated by the line 99 of FIG. 3, showing the upper and lower dieparts in the open oridle position;

FIG. 10 is a view similar to FIG. 9, but showing the parts in the closedor completed forming position;

FIG. 11 is a view similar to FIG.*10, but showing the parts in adifferent arrangement to impart a different form to the panel; and

FIG. 12 is a fragmentary perspective view of shearing die means of thepress for cutting an opening in the panel.

Referring first to FIG. 4, there are shown an inner panel I and an'outerpanel 0 which'may be assembled and secured together to form a door. Thepanel 0 has upstanding flanges formed along the four edges thereof,

all of substantially the same height. The flange H along onelongitudinal edge of the panel which is to correspond to' the hinge edgeof the finished door has its ends substantially squared or perpendicularto the bend line of the flange, and the adjacent ends of the flanges Fon the transverse edges of the panel are similarly formed. These ends ofthe transverse flanges F are disposed substantially in the plane of theinner face of the flange H, while the ends of the flange H are spacedinwardly relative to the bend line of the transverse flanges bysubstantially the height of the flanges. This relationship of theflanges and ends at the corners of the panel between which the flange Hextends is effected by cutting from these corners of the sheet Srectangular corner portions each having an extent longitudinally of thesheet or panel substantially twice the flange height, and a transverseextent substantially equal to the height of the flanges. At their otherends, the transverse flanges F are inclined or angled, at substantially45, to the intersection of the bend lines of the transverse flanges withthe bend line of the flange F formed on the other longitudinal edge ofthe panel, the ends of the longitudinal flange F similarly being angledfrom the edge thereof to the junctions of the bend lines of the adjacentflanges F. The angled ends of the flanges F are obtained by cutting offtriangular corner portions of the sheet at the two corners between whichthe longitudinal flange F extends.

The inner panel I is formed with an upstanding flange H substantiallyidentical to the flange H of the outer panel as already described,rectangular corner portions as described in connection with the outerpanel being cut from the corners between which the flange H extends. Onthe other three edges of the panel, rebent flanges are formed, eachincluding an upstanding portion U of substantially the same height asthe flange H, and an outwardly bent portion B extending at substantiallyright angles to the portion U and having a width substantially equal tothe height of the portion U. The upstanding portions of the transverserebent flanges have the inner faces thereof substantially in the commontransverse planes of the corresponding ends of the flange H and therebent flange on the other longitudinal edge of the panel. Theupstanding portion of the longitudinal rebent flange is disposedsubstantially in the plane of the adjacent ends of the transverse rebentflanges. The adjacent ends of the upstanding portions of the rebentflanges and of the upstanding flange H thus substantially meet alonglines substantially perpendicular to the plane of the panel, while theoutwardly bent portions B of the rebent flanges lie in the same planeparallel to the panel. To provide for this relationship of the rebentflanges, square corner portions are cut from the corners between whichthe longitudinal rebent flange extends, each side of the square cornerportions having a length or width substantially twice the height of theflange H or the upstanding portion U of the rebent flanges, or in otherwords an extent equal to the combined width of the portion B and heightof the portion U.

Each of the door panels I and O is provided with a window aperture W anda lock aperture L, the corresponding apertures of the two panels beingdisposed in substantial registry in the completed door to accommodate awindow, screen, or like insert in the opening provided by the aperturesW, and a suitable door lock in the opening afforded by the apertures L.An opening for a lock or latch bolt may be punched in any suitablemanner in the upstanding portion U of the longitudinal rebent flange ofthe inner panel.

In forming the door, suitable material such as wood may be disposed inthe interior of panel I about the apertures W and L, and the remainderof the panel substantially filled with heat and sound insulatingmaterial, suitable adhesive being employed to secure these core orfiller materials to the panel. The panel 0 is disposed over the openside of panel I with the two flanges H overlapping, adhesive beingapplied to effect securement of panel 0 to the filler materials, and theassembly held under pressure until the adhesive has set. The threeupstanding flanges of the outer panel are then bent over the outwardlyextending portions B of the rebent flanges of the inner panel so as tooverlap and envelop the same, and thus interlock the two panels. Anysuitable means,

' age for steadying the movements of the platen.

such as spot welding, may be employed to further secure the panelstogether. It will be evident that the outturned portions B of the innerpanel, with the enveloping edge portions of the panel 0, provide aflange about three edges of the door, on which suitable weatherstripping or other gasket means may be mounted to assureweathertightness. The overlapping flanges H in each of the panels, whichmay be backed by a wooden or like securing strip, provide for the hingedmounting of the door and may also carry gasket or weather strip means.

Referring now to FIG. 1, there is shown a press according to theinvention, generally rectangular in plan and comprising a supportingframework formed in any suitable manner. The framework is shown ashaving a lower supporting portion including corner uprights andhorizontal, diagonal, and vertical brace elements 21, and an upperrigidifying portion spaced above the lower frame portion and defined bylower horizontal members 22 and suitably formed and disposed bracingmembers 23. The upper frame portion is spaced and supported above thelower frame portion by four vertical columns or rods 24 at the cornersthereof. A horizontal fixed bed 25 in the form of a rectangular plate orthe like facing downwardly and backed by the members 22, is secured atthe upper ends of the columns or rods 24. The rods 24 are secured attheir lower ends to a horizontal table 26 fixed on the lower frameportion. Mounted on the table 26 are means for applying the formingpressure in operation of the press, shown as a number of hydrauliccylinders 27, in this case six, each of which has telescoped therein anupwardly projectable piston 28. The pistons carry a movable bed orplaten 29 of the press for movement thereof toward and from the fixedbed 25 by operation of the cylinders. The platen has apertures in itscorner portions in which are mounted guide bushings or sleeves 3t)slidable on the frame rods 24, which thus serve also to guide thevertical movements of the platen. At each end of the press, twotransversely spaced pairs of toggle links 31 connected by a commonhorizontal pivot rod 32 are provided, one link of each pair beingpivoted to the table 26 and the other to the underside of the platen.Only one pair of links 31 is shown at each end of the press. Alongitudinally extending horizontal tie member connects the rods 32 toprovide a toggle link- In the present case, the tie member is shown 'ascomprising a tubular element 33 having extending longitudinally thereofa pair of rigidifying plate elements 34 welded thereto in diametricallyopposed relation and disposed in a vertical plane. The cylinders 27 aresupplied with fluid under pressure from a suitable source, not shown,through a control valve 35 having an operating lever 36 by which it maybe moved to connect said source to branched conduit means 37 leading tothe several cylinders to cause projection of the pistons, or to connectthe conduit means to exhaust so as to effect collapse or retraction ofthe cylinders and pistons. An actuating cylinder 38 is mounted on thesupporting framework adjacent the control valve 35, adapted to beoperated by any suitable pressure fluid which may be that employed forcylinders 27, and having a piston rod 39 pivotally connected to theoperating lever 36 of the valve, so that movement of piston 39 in onedirection or the other may effect connection of the cylinders 27 topressure or exhaust. Suitable electrical means, not shown, may beemployed to effect operation of the cylinder 38 in response to actuationof a manual pushbutton or like switch to move the valve to a positionconnecting the pressure source to cylinders 27 and to cause reverseoperation of the cylinder by automatic means to move the valve 35 to aposition exhausting the cylinders 27. In this manner, a cycle of thepress may be set in motion by manually controlled means to effect thedesired forming movement of the platen 29 toward the bed 25 and thereverse movement to the open, idle, or loading position.

On the movable platen 29 is secured a forming die structure generallyindicated at '40, suitably arranged for cooperation with a complementarydie structure suitably secured on the fixed bed 25. As best showngenerally in FIG..3," and in detail inFIGS/S to 8, the die structure 40comprises a number of die parts including a break or die member 42extending adjacent onelongitudinal edge of the platen 29, anotherbending die member 43 parallel to member 42 disposed adjacent theopposite platen edge, and a pair of die. members 44 similar to themember 43 extending at right angles to the members 42 and 43 adjacentthe ends thereof, transversely of the platen. The members 42and 43terminate short of the transverse planescf the members .44, and themembers 44 similarly do not extend to the planes of the inner faces ofthe members 42 and 43, as will be clear from FIG. 3. The die member 42is employed in forming the flanges H of the panels I and O, and the diemembers 43 and 44 in bending the other three flanges of each panel. Dieblocks 45 secured on the platen 29 abutting the ends of the members 44adjacent the die member 42 in effect extend those members to the planeof the inner face of member 42. Similar die blocks 46 are secured at theends of the member 42, but do not extend to the planes of the innerfaces of the die members 44, the spacing being substantially equal tothe height of the upstanding flange F or flange portion U. The blocks ineach case have plane bending faces flush with the inner faces of the diemember-s which they abut, and shearing faces directed toward the planesof the adjacent die members. A shearing strip 47 is secured extendingbetween the lower portions of each pair of blocks 45 and 46, with anouter face in the common plane of the bending face of block 46 and theshearing face of the block 45, as will be clear from FIGS. 3 and 8. Twoshearing blocks 48 are secured on the fixed bed 25, each having a pair.of rectangularly related shearing faces and being located to have thesefaces cooperate with the shearing faces of one of the pairs of blocks 45and 46 and the associated strip 47. One of the blocks 48 is shown inFIG. 8. The die block construction at each end of member 42, with thecooperating block 48, cuts off the rectangular corner portionhereinabove described from a rectangular sheet S from which the panel isformed. The sheet S is of metal or other suitable selfsustainingmaterial, such as aluminum, stainless steel, ordinary steel sheet, orthelike, and is shown in FIG. 3 in phantom by broken line, in positionsupported on the die members 42, 43, and 44, ready for the formingoperation. Depending upon the particular form and arrangement of the diemeans employed on the platen and bed, the sheet S is folrned either intothe inner door panel I or the outer door panel 0, both substantially asshown in FIG. 4. Stops 49 are provided on the die member 43 and one ofthe members 44 to assure proper positioning of the sheet.

Die blocks are also secured at the adjacent ends of die members 43 and44, the particular form depending upon which of the panels I and O is tobe formed. In FIG. 3, blockconstructions for cutting both square andtriangular corner portions are shown. At the corner defined at the leftend of member '43 as viewed in the figure and the adjacent end of theadjacent member 44, and as shown more clearly in FIG. 7, there isprovided a pair of substantially rectangular die blocks 50, one at eachof the adjacent ends of members 43 and 44. The outer end face of eachblock 59 serves as a shearing or cutting face and is spaced from theplane of the inner or bending face of the die member toward which it isdirected, the inner face of each block 50 being substantially flush withthe die member which it abuts. A pair of shearing strips 51 similar tostrip 47 are employed in a similar manner, each strip abutting the innerface of one of the blocks 5%) and extending with an outer face in theplane of the cutting face of the block. The length of each stripcorresponds to the space between the inner face of the block it abutsand the plane of the-cutting face of'the other block, which space isequal to the height of the flange F or flange portion'U. On the'bed 25are secured two shearing .die blocks, not shown, but similar to theblocks 48 inform, location relative to the pairs of blocks 50, andoperation. The die block structure just described operates to cut thesquare corner portions from the sheet in forming of a panel I.

At the right end of die member 43 as viewed in FIG. 3, a die blockstructure for cutting a triangular'corner portion from sheet S informing an outer panel 0 is' shown. FIGS. 5 and 6 illustrate thisstructure in greater detail, and show the loading and the shearingpositions of the parts. In respectively abutting relation to theadjacent ends of the die members 43 and 44, die blocks 52 are secured.The blocks 52 are generally similar to the rectangular or cubical blocks45, 46 and 50 previously shown and described, but each has atriangularprojecting portion 53 defined by the inner face thereof and adiagonally extending surface. The blocks 52 are arranged with theirinner faces fiush with the inner faces of the die members they abut, andwith the apices of the triangular portions substantially in contact, sothat the diagonal surfaces extend in a common plane diagonally of thecorner defined by the inner block faces. A shear die block 54 ofrectangular form is mounted on the press bed 25 in a position such thatone of its cutting faces extends substantially in the same .plane as thediagonal surfaces of the triangular portions 53 of blocks '52, as bestshown in FIG. 5, so that it may cooperate therewith to shear ofi atriangular corner portion of the sheet S as the die parts move relativeto each other from the position of FIG. 5 to that of FIG. 6. The dieblock 54 may, if desired, be the same block employed for cooperationwith the die blocks 50, being removably mounted on the bed 25 to allowof its positioning either in the diagonal position of FIGS. 5 and 6 or aposition substantially like that of the block 48 in FIG. 8, with facesparallel to the planes of the shearing faces of thecooperating dieblocks 50.

It will be appreciated that both the die block structures incorporatingthe blocks 50 and the blocks 52 are not actually used at the same time,two similar structures with the blocks 50 being employed when an innerpanel is to be for-med, and two structures with the blocks 52 being usedwhen an outer panel is to be formed. By the use of bolts or like meansto secure the various parts, as well known inthe art, the several blocksand asso ciated parts may easily be mounted and removed.

Within the rectangular space defined by the die members 42, 43, and 44there is disposed an ejector plate 55 having one longitudinal edge inthe plane of the inner face of the die member 42, the other three edgesthereof being equally spaced from the inner faces of the members 43 and44. The ejector plate 55 is of less thickness or height than themember-s 42, 43, and 44, and has a number of ejector rods 56 dependingtherefrom. The rods 56 are secured to the plate 55 by the screwing ofreduced threaded upperends thereof in threaded apertures 57 extendingthrough the plate, as clearly shown in FIGS. 9 and 10. The rods extendthrough suitable apertures in the platen 29 and through guide tubes 58secured as by welding to the lower face of the platen in registry withthe apertures. An enlargement or collar 59 is provided on each rod belowthe associated tube 58 to limit upward movement of the rod relative tothe platen by engagement with the tube, the arrangement. being such thatthe highestrelative level of the ejector plate is the plane of the uppersurfaces of the die members 42, 43, and 44. When the press is in open orloading position, the rods 56,- of which four are employed in thepresent instance, engage on the table 26 and hold the ejector plate 55elevated to the level of the upper faces of the diernembergwhile whenthe platen 29 is raised ina forming operation, the

rods 56 are lifted off the table 26 and the ejector plate thus broughtto a position resting on the platen. This will be clear from FIGS. 9 and10, in which the lowered and raised positions of the platen, and thecorresponding positions of ejector plate 55, are illustrated. In itselevated position level with the top surfaces of the members 42, 43, and44, the ejector plate aids in supporting the metal sheet S. The sheet Sis somewhat larger than the area defined by the members 42, 43, and 44,projecting outwardly of the inner faces of these die members by adistance substantially equal to the height of the flanges F and H orupstanding flange portion U to be formed on the edges. The ejector platemember has a rectangular aperture 60 formed therein corresponding toaperture W to be cut in the sheet S. A smaller rectangular aperture 61is also provided in the plate 55, corresponding to the door lockaperture L of the panel. Another aperture 62 similar to apertures 60 maybe provided, if desired. Within the outline of the aperture 60, and inslight clearance relation therewith, there is secured on the platen 29 arectangular shearing die 63 provided by suitable plates or bars ofsomewhat greater thickness or height than the ejector member 55, as bestshown in FIGS. 9 and 10. Within the outline of the aperture 61 is ashear block 64 of slightly smaller dimensions, secured on the platen,and like the die 63 having a somewhat greater height than the ejectorplate. The aperture 61, as evident from FIG. 3, is located midway of theend die members 44, or midway of the length of the sheet S when disposedin forming position as indicated by the broken lines in the figure, andis spaced slightly from the die member 43.

The die parts structure, generally designated 65, secured on the bed 25of the press, as already indicated, complements the die structure 40 onthe platen 29 just described, and engages therewith upon upward movementof the platen to engage the parts for forming the sheet S disposedtherebetween into an inner panel I or outer panel 0, as the case may be.The structure 65 includes die means cooperating with each of the severaldie members and elements mounted on the platen 29. Specifically, inaddition to the shearing or cutting blocks already mentioned, there issecured on the lower face of the bed 25 an elongated bending die member66 extending parallel to and spaced inwardly relative to the bending diemember 43, the spacing being substantially equal to the thickness of thesheet S, as will appear from FIGS. 9 to 11 inclusive. A pair of similardie members 67 are secured on the bed in substantially the samerelationship to the end die members 44, as shown in FIGS. and 8. Anothergenerally similar member 68 is provided on the bed parallel to the diemember 42, the outer face of member 68 being spaced inwardly of theplane of the inner face of member 42 by the thickness of sheet S. Eachof the die members 66 and 67 has a rabbet 68 formed in the lower outercorner edge thereof, the rabbet being defined by a pair of rectangularlyrelated surfaces each of a width substantially equal to the flangeheight. A die bar 70 of substantially square cross section is removablysecured in the rabbet of each member 66 and 67, the die bar 70 havingeach of its sides of such width that it fits in the rabbet with twoadjacent faces engaging against the rabbet surfaces and its other twofaces flush with the outer and lower surfaces of the die member 66 or 67to which it is secured. The rabbets 69 and die bars 70 extend for thefull length of the respective die members 66 and 67, which are oflengths equal to the full distance between the die members between whichthe members 66 and 67 extend. That is, the die members 66, 67 and 68engage each other at their respectively adjacent ends to define closedcorners, as best shown in FIG. 8.

Also secured on the press bed 25 are four shear die members 71rectangularly arranged for cutting cooperaation with the shearing die63, each of the die members 71 being mounted with the inner facesubstantially in the plane of the outer face of the corresponding sideof die 63, as clearly shown in FIGS. 9, 10, and 12. The die members 71cooperate with the shearing die 63 to cut a portion S (FIG. 10) from thesheet to form the opening W. It will be noted that as exaggeratedlyshown in FIG. 12, each of the members 71, only one of which is fullyshown, has a lower cutting edge 72 which at its central portion isslightly curved, the curved portion merging with straight portions ofthe edge which extend outwardly and upwardly at a slight angle. By thisconstruction, each of the members in the forming movement of the pressfirst engages the sheet S at substantially a point for holding contacttherewith, then cuts the sheet at this point of contact, continuing thecutting in a progressive shearing action as the remainder of the edgeengages the sheet. Drawing of the sheet material during the cuttingoperation is avoided, and easier and smoother cutting of the sheet, anda cleaner cut, are provided by this construction and action. Theshearing die 63 may have its shearing edges similarly formed. The sheardie members 71 are shown in the present instance as secured to the bedby means of a suitable mounting plate 73 so that they may quickly andeasily be attached and removed as a unit, although of course anyappropriate means may be employed for this purpose. Similar shear diemembers, not shown, are provided for cooperation with the shear block 64to cut the aperture L in the sheet, although the same edge formation isnot necessarily employed in view of the relatively small size of thesheet portion cut from the sheet thereby. A rectangular stripper 74(FIGS. 9 and 10) is provided disposed within the area defined by the diemembers 71 and presenting four edges each substantially engaging againstthe inner face of one of the shear die members 71 to prevent the portionS from remaining frictionally engaged with the members 71. The stripper74 is arranged for vertical movement relative to the bed 25, having asuitable number of guide rods 75, only one of which is shown, extendingupwardly therefrom through suitable registering apertures in themounting plate 73 and bed 25, the rods sliding in the apertures to allowcorresponding movement of the stripper and having enlarged heads 76 orthe like on their upper ends to limit the downward movement of thestripper. Suitable means such as a plurality of coil springs 77, onlyone of which is shown, are engaged between the mounting plate 73 and thestripper 74 to urge the stripper positively away from the mounting plateso as to overcome any friction tending to hold the sheet portion 8'within the shear die members 71. The stripper 74, as will be clear fromFIG. 10, moves relatively upward in the cutting action, by reason of theshearing die 63 forcing the sheet portion S and the stripper upwardlyabove the level of the die members 71.

In operation of the press, the rectangular sheet S is disposed as shownin FIG. 3 on the die parts or members mounted on the platen, in thelowered position thereof corresponding to the open or loading conditionof the press, and the control valve is operated by means of theactuating cylinder 38 and its electrical control circuit to effect flowof fluid under pressure to the cylinders 27 so as to cause projection ofthe pistons 28, lifting the platen with the die means thereon and thesheet S overlying the same upwardly into pressing engagement with thedie means on the bed 25. As will be readily evident from FIGS. 5 to 8inclusive, the corner portions of the sheet will be sheared away by thecooperating die blocks on the platen and bed, as previously described.In the case of the square and rectangular corner portions, the shearingis not completed until the upper edges of the strips 47 or 51 have movedupwardly past the lower edges of the die blocks on the bed. The dieblocks and 46 and the shear strip 47, with the cooperating die block 48,by which rectangular corner portions of the sheet are cut away at theends of the hinge-edge forming die portions are the same for either theinner panel I or the outer panel 0, and need not be changed when one orthe other panel is to be formed. The pairs of die blocks 52 and thecooperating block 54 on the bed for shearing off the triangular cornerportions of the sheet when an outer panel is to be formed therefrom,however, must be replaced by the pairs of die blocks 50 on the platenand the cooperating die blocks on the bed which serve to sever thesquare corner portions from the sheet when the inner panel I is to beformed therefrom. Of course, the reverse is true when an outer panel isto be formed after the press has been employed to form an inner doorpanel I. Similarly, the die bars 70 must be secured in the rabbets 69 ofthe bending die members 66 and 67 on the bed when an outer door panel isto be formed, and mounted on the inner faces of the die members 43 and44 on the platen, as shown in FIG. 11, when an inner panel I is to beformed. It will be evident, that each of the strips 47 and Sll might beformed integral with the associated block 45 or 50, and in any case maybe considered as in effect forming a cutting portion thereof.

Assuming that an outer panel 0 is to be formed and that the die meanshave been employed as described,'the sheet S on the platen is raisedby'upward movement of the platen from the full-line position of FIGURE.9 to the dotted-line position, in the course of which the ejector memberis engaged by .the platen and raised thereby. In this raised position,the sheet S supported on the die means on the platen has just come intocontact with the bending die members 66,67, and 68 of thebed,'.including the die bars 70, and also with the shearing die members71 and the stripper 74, as well as with the shear die members whichcooperate with the shear block 64 to form the door lock aperture L. Atthis same point in the upward movement of the sheet on the platen, thecorner die blocks 48 and 54 on the press bed are also in contact withthe upper surface of the sheet, ready to begin the shearing of therectangular and triangular portions. As the upward movement of the sheetcontinues from the momentary contacting position just .described, thetwo pairs or sets of corner die blocks 45 and 46'and the strips 47cooperate with the die blocks 48 to effect shearing of the rectangularcorner portions from the sheet, the shearing however not beingcomplete'until each block 48 comes into shearing relation with the shearstrip.47 which spans the gap between the associated blocks 45 and 46. Atthe same time, each die block 54 with its diagonally arranged shearingedge cooperates with the diagonal shearing face or edge provided by thetriangular portions 53 of the die blocks 52, at each of the othercorners of the sheet, to sever the triangular corner portions therefromwhich provide the angled ends of the longitudinal upstanding flanges Fof the outer panel. While the several corner portions are beingsevered,'the flanges F and H of the outer panel 0 are being formed bycooperation of the bending die members 42, 43, and 44 on the platen andthe corresponding die members 68, 66, and 67 on the bed. By reason ofthe slight spacing between the planes of the outer faces of the diemembers on the bed and the inner faces of the corresponding die memberson the platen, as shown in FIGS. 9 andlO, the edge portions of the sheetextending outwardly beyond the inner faces of the bending die members onthe platen are not sheared, but are bent upwardly, as shown in FIGS. 9and 10, in which the longitudinal flange F is shown as being formed bybending of this marginal portion of the sheet as the longitudinal diemember 43 moves upwardly beyond the lower face of the die member 66. Itwill be understood that the folding of the other flange F and of theflange H is effected in the same manner as shown and described inconnection .with the longitudinal flange F. The cutting of the windowand lock apertures in the sheet does not begin until the platen hasmoved to the point at which the shearing die 63 engages the lowersurface of the sheet and continues upwardly to force the sheet againstthe curved cutting edges 72 of the shearing die members 71, against theforce of the springs 77, to effect the progressive shearing or cut"-ting of the several sides of the opening. The door'lock opening issimilarly cut at this time, and in'substantially the same manner.

This completes the forming of the panel prior to the employment thereofin the final door assembly, and the platen 29 now is caused to descend,preferably by antomatic means which actuate the cylinder 38 to causemovement of the control valve 35 to.a position effecting exhaust of thepressure fluid from the cylinders 27, so that the pistons 28 areretracted. If desired, of course, manually controlled means may beemployed to'act-uate the cylinder 38, or the cylinder and its connectionto the valve operating lever. 36 may be eliminated altogether, and thevalve manually operated as and when desired. As the platen descends, thesprings 77 urge the stripper 74 downwardly to force the portion S of thesheet which has been severed therefrom in the formation of the windowopening W downwardly out of engagement with the shearing die members 71,so that this portion of the sheet will descend with the remainder of thesheet. As has already been indicated, the portion of the sheet severedin the formation of the door lock opening, due to its relatively smallsize, does not necessarily require a stripper construction because itmay readily be withdrawn from the shearing structure by hand if itbecomes lodged therein, but a stripping arrangement generally similar tothat of the stripper 74 may be provided if desired. When the platenreaches its lowermost position, it is halted by the full retraction ofthe pistons 28 within the cylinders 27, and also by engagement of thelower ends of the tubular guides 58 on the collars 59 of the ejectorrods 56 depending from the ejector plate or member 55, the lower ends ofthe rods engaging on the table 26, so that a positive and steadypositioning of the platen in its lowermost position is obtained. Duringthe descent of the platen, asv the rods 56 come into engagement with thetable 26, the ejector plate 55 is held against further downwardmovement, while the platen and the die means thereon are free tocontinue their movement until the ejector guide tubes 58 engage the rodcollars 54, with the result that the ejector plate and the sheet S, nowin the form of the panel 0, is brought to the level of the uppersurfaces of the die members 42, 43, and 44, so that it may readily beremoved from the press. After removal of the portions cut from the sheetin the formation of the window and lock openings, another sheet 8 may bedisposed on the platen-carried die means and the cycle repeated to formanother outer door panel 0, in the manner just described.

If an inner panel I is to be formed from the sheet S, the die bars 70are secured on the inner faces of the respective bending die members 43and 44, as shown in FIG. 11, and the pairs or sets of corner die blocks50 and shear strips 51, with the cooperating blocks of the die means 65,are secured on the platen and bed. When the control valve is operated toeffect projection of the pistons 28 from the cylinders 27 to raise theplaten, the ejector member or plate 55 is engaged from beneath andraised by the platen, the sheet as it is raised by the die means on theplaten having the rectangular and square corner portions cut therefromby the several die. block structures already described, substantially inthe manner described in connection with the forming of the outer panel0. Substantially simultaneously or contemporaneously with the severingof the corner portions, the rebent flanges are formed of the marginalportions of the sheet by the cooperation of the rectangularly relatedsurfaces of the rabbets 69 of the die members 66 and 67 on the bed andthe inner and upper faces of the die bars 70 mounted on the die members43 and 44, substantially as shown in FIG. ll. It will be apparent thatby reason of the slight spacing between the planes of the. outer facesof the members 66 and 6 7 and the inner faces of the die members 43 and44, the die bars when secured on 1 1 the die members 43 and 44 willsimilarly have a space substantially equal to the thickness of the sheetbetween the planes of their inner faces and the planes of the verticalrabbet-defining surfaces, and the bars 70 are secured at such a levelthat their upper faces are similarly spaced from the horizontalrabbet-defining surfaces of the members 66 and 67 when the lower facesof those members have come into engagement with the upper surface of thesheet in opposition to the upper surface of the ejector plate 55 whichunderlies the sheet. The cutting of the Window and lock openings in thesheet is effected in the manner already described in connection with theformation of the outer door panel 0. The lowering of the platen and thepositioning of the sheet by the ejector plate a convenient level forremoval follows as in the case of the outer panel.

It is pointed out that it is necessary to reverse the sheet from whichan inner panel is to be formed relative to the sheet from which an outerpanel is formed. The panels must be so formed that when they are in theassembling relation generally indicated in FIG. 4, the flanges F and Hof panel extend toward the upstanding flange portions U and flange H ofpanel I, and in planes parallel thereto, with the flanges H atcorresponding edges of the panels and the apertures W and L of the twopanels in respectively registering relation. Since as explainedereinabove both panels are formed with the flanges H at the same side oredge of the die means and the upstanding flange portions and flanges ofboth are formed by folding of the sheet edges upwardly, it will beapparent that if each panel were also formed with the aperture W at theleft-hand portion thereof as viewed in FIG. 3, the panels could not beassembled as explained hereinabove. To provide for the necessaryrelative reversal of one panel relative to the other without requiring atime-consuming and tedious rearrangement of the die means on the platenand on the bed, the ejector member or plate 55 and the shearing die 63associated with the opening 60 thereof are arranged for readyrepositioning on the platen. In order properly to form either an inneror outer panel after the press has been used to form the other type ofpanel, with the ejector plate 55 in the position shown in FIG. 3, havingthe opening 60 at the left end portion thereof, the member 55 isreversed in position so that the opening 60 is at the right hand portionthereof, or in other words at the right hand portion of the platen. Thisis accomplished by unscrewing the ejector rods 56 from the threadedopenings 57 in the ejector plate, so that the ejector member may beremoved from the platen, turned about its transverse axis to positionthe previously upper face thereof as the lower face, then replacing theejector plate on the platen, and again screwing the upper ends of theejector rods 56 into the threaded openings 57 of the ejector, this timefrom the opposite face of the plate 55. The opening 60 now of course islocated at the right-hand portion of the forming structure. The die 63,being bolted or otherwise removably secured on the platen, may readilybe detached and secured in its new position within the outline ofaperture 60 either before or after the reversed ejector 55 is disposedin its new position. It will be noted that the threaded aperturesthrough the ejector member are spaced the same distance from theadjacent ends of the member, and from the transverse bending die members44, so that there is no difiiculty in the repositioning of the ejectorplate, and the plate is located in exactly the same relation to the diemembers 42,, 43, and 4-4 rcgardless of the position of the opening 60.

In the present instance, the lock opening 61 is shown as located exactlyhalf-way between the ends of the ejector plate 55, so that it is notnecessary to make any provision with regard to it because of thereversal of the ejector plate. If the opening 61 were not midway of thelength of the ejector member, however, it would be necessary only toremove the shear block 64 and relocate 12. it on the platen at aposition such as to come within the outline of the opening 61,substantially in the manner of the shear die 63 in connection with thewindow opening 60.

Where herein the various parts of the inventive structure have beenreferred to as located in a right or left, or an upper or lowerposition, it will be understood that this is done solely for the purposeof facilitating the description, and that such references relate only tothe relative positions of the parts as shown in the drawings.

Also, it is to be understood that the illustrated embodiment of theinvention is exemplary, and that many changes and modifications may bemade therein without departing from the invention, and that theinvention is not to be limited except as required by the scope andspirit of the appended claims.

I claim:

1. In a press having complemental die members relatively movableopposedly into engaged relation for bending marginal portions ofadjacent edges of a metal sheet to provide thereon either upstandingflanges of predetermined height having at least one end inclined orrebent flanges each having an upstanding portion of substantially saidheight and an outturned portion extending from said upstanding portion adistance substantially equal to said height, for cutting off a cornerportion of the sheet between said adjacent edges prior to the forming ofsaid flanges, and for contemporaneously cutting a sub stantiallyrectangular opening in the sheet, first bending die means on a first ofsaid die members having substantially parallel to the direction of saidrelative movement a plane surface of an extent in said direction atleast equal to said height, second bending die means on the second diemember having a first plane face parallel to the plane of said planesurface and spaced therefrom by substantially the thickness of saidsheet and also having a second plane face normal to said first face,said second bending die means having therein a dihedral rabbet definedby a pair of rectangularly related surfaces each having a widthsubstantially equal to said height with one extending substantiallyparallel to said first face and the other substantially parallel to saidsecond face, a die bar of substantially square cross section each sideof which has a width substantially equal to said height, said bar beingselectively mountable either on said second die means in said rabbetwith two adjacent sides thereof substantially flush with thecorresponding faces of said second die means or on said first die meansprojecting from the plane surface with one side substantially normalthereto and a Side adjacent said one side parallel to the plane surfaceand spaced by substantially the thickness of said sheet from the planeof said first rabbet surface, means for detachably mounting said barselectively on one of said bending die means, means on at least one ofsaid first and second die means for supporting therebetween in a planesubstantially normal to the planes of said plane surface and said firstface a metal sheet edge portion which measured from said plane surfaceto the adjacent sheet edge has a width substantially equal to saidheight, said bar when mounted in said rabbet cooperating with said planesurface upon said die member movement to bend said edge portion into anupstanding flange of said predetermined height and when mounted on saidplane surface cooperating with said rabbet-do r fining surfaces uponsaid die member movement to bend the portion of the sheet adjacent saidedge portion to a position substantially normal to the edge portion andto the body of the sheet to provide the upstanding portion of a rebentflange having said edge portion as the outturned portion, rectangularlyarranged first cutting die means on one of said die members defining anoutline corresponding to an opening to be cut in the sheet and affordingsupport for the sheet inwardly from said outline, second cutting diemeans on the other of the die members rectangularly arranged totelescope in close-fitting relation with saidfirst cutting ,die meansupon said die member movement to cut the sheet along said outline forsevering therefrom a portion of the sheet to provide said openingtherein, at least one of said first and second cutting die meanscomprising shear elements each having a curved cutting edge affording aprogressive shearing of the sheet, two pairs of cutting elementsselectively disposable on one of said die members positioned to havesaid sheet corner portion disposed adjacent thereto upon insertion ofsaid sheet in the press, one of said pairs when disposed on said diemember having the cutting elements thereof presenting a pair ofrectangularly related plane surfaces each parallel to the direction ofmovement of the die members and extending in a plane parallel to theline of one of said adjacent edges and intersecting the line of theother edge, the projected planes of said plane surfaces defining on thesheet a square corner portion of an extent inward from each of saidedges substan tially equal to the combined height and width of saidupstanding and outturned portions respectively of said rebent flange,the other of said pairs of cutting elements when disposed on said onedie member having the cutting elements thereof presenting a pair ofaligned plane surfaces extending diagonally relative to said adjacentsheet edges, the projected planes of said diagonal plane surfacesdefining on the sheet a triangular corner portion of an extent alongeach of said edges substantially equal to said height, a cutting dieblock on the other of said die members having a pair of rectangularlyrelated plane surfaces each parallel to said direction of die membermovement and of at least said corner portion extent, said die blockbeing detachably securable on said other die member selectively in oneposition with said plane surfaces thereof respectively in shearingrelation with the plane surfaces of said one pair of cutting elements orin a second position with one of said plane surfaces thereof extendingdiagonally relative to said adjacent edges in shearing relation withsaid diagonal plane surfaces of the other pair of cutting elements,means for selectively securing said pair of cutting elements detachab-lyon said one die member, and means for detachably securing the cuttingdie block on said other die member selectively in one of said positions,whereby preliminary to formation of rebent flanges on adjacent edges ofthe sheet the first cutting element pair may cooperate with said dieblock in said first position thereof to shear said rectangular cornerportion from the sheet, and prior to formation of upstanding flanges onsaid edges said other cutting element pair may cooperate With the dieblock in said second position thereof to shear said triangular cornerportion from the sheet.

2. In a ress having com lemental die members relatively movableopposedly into engaged relation for bending marginal portions ofadjacent edges of a metal sheet to provide thereon either upstandingflanges of predetermined height having at least one end inclined orrebent flanges each having an upstanding portion of substantially saidheight and an outturned portion extending from said upstanding portion adistance substantially equal to said height, for cutting off a cornerportion of the sheet between said adjacent edges prior to the forming ofsaid flanges, and for contemporaneously cutting a substantiallyrectangular opening in the sheet, first bending die means on a first ofsaid die members having substantially parallel to the direction of saidrelative movement a plane surface of an extent in said direction atleast equal to said height, second bending die means on the second diemember having a first plane face parallel to the plane of said planesurface and spaced therefrom by substantially the thickness of saidsheet and also having a second plane face normal to said first face,said second bending die means having. therein a dihedral rabbet definedbya pair of rectangularly related surfaces each' extending substantiallyparallel to one of said faces and having a width substantially equal tosaid height, a

114 die bar of substantially square cross section each side of which hasa width substantially equal to said. height, said bar being selectivelymounted either on said second die means in said rabbet with two adjacentsides thereof substantially flush with the corresponding faces of .saidsecond means or on said first die means projecting from the planesurface with one side substantially normal. thereto and a side adjacentsaid one side parallel to the. plane surface and spaced by substantiallythe thickness of said sheet from the plane of the rabbet surfaceparallel to said first face of the second die means, means fordetachably mounting said bar selectively on one of said bending diemeans, means on at least one of said first and second bending die meansfor supporting therebetween in a plane substantially normal to theplanes of said plane surface and said first face a metal sheet edgeportion which measured from said plane surface to the adjacent sheetedge has a width substantially equal to said height, said bar whenmounted in said rabbet cooperating with said plane surface upon said diemember movement to bend said edge portion into an upstanding flange ofsaid predetermined height and when mounted on said plane surfacecooperating with said rabbetdefining surfaces upon said die membermovement to bend the portion of the sheet adjacent said. edge portion toa position substantially normal to the edge portion and to the body ofthe sheet to provide the upstanding portion of a rebent flange havingsaid edge portion as the outturned portion, rectangularly arranged firstshearing die means on one of said die members defining an outlinecorresponding to an opening to be cut in the. sheet, second shearing diemeans on the. other of the die members rectangularly arranged totelescope in closefitting relation with said first shearing die meansupon said die member movement to cut the sheet along said outline forsevering therefrom a portion of the sheet to provide said openingtherein, at least one of said first and second shearing die meanscomprising shear elements each having a curved cutting edge affording aprogressive shearing of the sheet, two pairs of cutting elementsselectively disposable on one of said die members positioned to havesaid sheet corner portion disposed adjacent thereto upon insertion ofsaid sheet in the press, one of said pairs when disposed on said diemember presenting a pair of rectangularly related plane surfaces eachparallel to the direction of movement of the die members and extendingin a plane parallel to the line of one of said adjacent edges andintersecting the line of the other edge, the projected planes of saidplane surfaces defining on the sheet a square corner portion of anextent inward from each of said edges substantially equal to thecombined height and width of said upstanding andoutturned portionsrespectively of said rebent flange, the other of said pairs of cuttingelements when disposed on said one die member presenting a pair ofaligned plane surfaces extending diagonally relative to said adjacentsheet edges, the projected planes of said diagonal plane surfacesdefining on the sheet a triangular corner portion of an extent alongeach of said edges substantially equal to saidheight, a pair of cuttingdie blocks selectively securable on'the other of said die members, oneor said die blocks having a pair of rectangularly related plane surfaceseach parallel to said direction of die member movement and of at leastsaid rectangular corner portion extent along said edges, the other ofsaid die blocks having a plane surface parallel to said direction ofmovement and extending diagonally relative to said. adjacent sheet edgeswith the plane thereof defining with said edges a triangle corresponding to said triangular corner portion, said one die block beingdetachably securable on said other die memher in position with saidplane surfaces thereof respectively in shearing relation with the planesurfaces of said one pair of cutting elements, said other die blockbeing detachably securable on the other die member with said planesurface thereof in shearing relation with said diagonal plane surfacesof the other pair of cutting elements, means for detachably securingsaid cutting elements selectively on said one die member, and means fordetachably securing the die blocks selectively on said other die memberwhereby the first cutting element pair may cooperate with said one dieblock to shear said square corner portion from the sheet and said othercutting element pair may cooperate with the other die block to shearsaid triangular corner portion from the sheet.

3. Structure substantially as defined in claim 2, in which each of thecutting elements of said one pair is spaced from said plane surface ofthe other cutting element thereof, and including a shear strip having aplane face flush with the plane surface of one of the cutting elementsof said one pair and of appreciably less extent than such plane surfacein said direction of movement and extending from said one element atleast to the plane of the plane surface of said other cutting element.

4. In a press having complemental die members relatively movableopposedly into engaged relation for bending a marginal portion of ametal sheet to provide thereon either an upstanding flange ofpredetermined height or a rebent flange having an upstanding portion ofsubstantially said height and an outturned portion extending from saidupstanding portion a distance substantially equal to said height andcontemporaneously cutting a substantially rectangular opening in thesheet, first die means on a first of said die members havingsubstantially parallel to the direction of said relative movement aplane surface of an extent in said direction at least equal to saidheight, second die means on the second of said die members having afirst plane face parallel to the plane of said plane surface and spacedtherefrom by substantially the thickness of said sheet and also having asecond plane face normal to said first face, said second die meanshaving therein a dihedral rabbet defined by a pair of rectangularlyrelated surfaces each extending substantially parallel to one of saidfaces and having a width substantially equal to said height, a die barof substantially square cross section each side of which has a widthsubstantially equal to said height, said bar being selectively mountedeither on said second die means in said rabbet with two adjacent sidesthereof substantially flush with the corresponding faces of said secondmeans or on said first die means projecting from the plane surface withone side substantially normal thereto and a side adjacent said one sideparallel to the plane surface and spaced by substantially the thicknessof said sheet from the plane of the rabbet surface parallel to saidfirst face of the second die means, means for detachably mounting saidbar selectively on one of said die means, means on at least one of saidfirst and second die means for supporting therebetween in a planesubstantially normal to the planes of said plane surface and said firstface a metal sheet edge portion which measured from said plane surfaceto the adjacent sheet edge has a width substantially equal to saidheight, said bar when mounted in said rabbet cooperating with said planesurface upon said die member movement to bend said edge portion into anupstanding flange of said predetermined height and when mounted on saidplane surface cooperating with said rabbet-defining surfaces upon saiddie member movement to bend the portion of the sheet adjacent said edgeportion to a position substantially normal to the edge portion and tothe body of the sheet to provide the upstanding portion of a rebentflange having said edge portion as the outturned portion, rectangularlyarranged first die elements defining an outline corresponding to anopening to be cut in the sheet and affording support for the sheetinwardly from said outline, second die elements on the other of the diemembers rectangularly arranged to telescope in close-fitting relationwith said first die elements upon said die member movement to cut thesheet along said outline for severing therefrom a portion of the sheetto provide said opening therein, at least one of said first and seconddie elements comprising shear elements each having a curved cutting edgeafiording a progressive shearing of the sheet.

5. In a press having complemental die members relatively movableopposedly into engaged relation for bending a marginal portion of ametal sheet to provide thereon either an upstanding flange ofpredetermined height or a rebent flange having an upstanding portion ofsubstantially said height and an outturned portion extending from saidupstanding portion a distance substantially equal to said height andcontemporaneously cutting an opening in the sheet, first die means on afirst of said die members having substantially parallel to the directionof said relative movement a plane surface of an extent in said directionat least equal to said height, second die means on the second of saiddie members having a plane face parallel to the plane of said planesurface and spaced therefrom by substantially the thickness of saidsheet, a dihedral rabbet defined in said second die means having thereina pair of rectangularly related surfaces one of which extendssubstantially parallel to said face and has a width substantially equalto said height, a die bar of a cross section providing two adjacentsides corresponding to said rabbet surfaces and a third side parallel toone of said two sides, said bar being selectively mounted either in saidrabbet with said two adjacent sides thereof engaging said rabbetsurfaces and said third side substantially flush with said face of saidsecond means or on said first die means projecting from the planesurface with one of said two sides substantially normal thereto and saidthird side parallel to the plane surface and spaced by substantially thethickness of said sheet from the plane of said one rabbet surface, meansfor detachably mounting said bar selectively on one of said die means,means on at least one of said first and second die means for supportingtherebetween in a plane substantially normal to the planes of said planesurface and said plane face a metal sheet edge portion which measuredfrom said plane surface to the adjacent sheet edge has a widthsubstantially equal to said height, said bar when mounted in said rabbetcooperating upon said die member movement with said plane surface tobend said edge portion into an upstanding flange of said predeterminedheight and when mounted on said plane surface cooperating upon said diemember movement with said rabbet surfaces to bend the portion of thesheet adjacent said edge portion to a position substantially normal tothe edge portion and to the body of the sheet to provide the upstandingportion of a rebent flange having said edge portion as the outturnedportion, first shear die means on one of the die members correspondingin outline to an opening to be cut in the sheet, and second shear diemeans on the second of the die members, said first and second shear diemeans being arranged to telescope in close-fitting relation uponrelative movement of the die members toward each other to sever aportion from the sheet to provide said opening therein.

6. In a press having complemental dic members relatively movableopposedly into engaged relation for bending marginal portions ofadjacent edges of a metal sheet to provide thereon either upstandingflanges of predetermined height or rebent flanges each having anupstanding portion of substantially said height and an outturned portionextending from said upstanding portion a distance substantially equal tosaid height and for cutting off a corner portion of the shcet betweensaid adjacent edges, first die means on a first of said die membershaving substantially parallel to the direction of said relative movementa plane surface of an extent in said direction at least equal to saidheight, second die means on the second of said die members having afirst plane face parallel to the plane of said plane surface and spacedtherefrom by substantially the thickness of said sheet and also having asecond plane face normal to said first face, said sec ond die meanshaving therein a dihedral rabbet defined by a pair of rectangularlyrelated surfaces having a width substantially equal to said height Withone extending substantially parallel to said first face and the othersubstantially parallel to said second face, a die bar of substantiallysquare cross section each side of which has a width substantially equalto said height, said bar being selectively mounted either on said seconddie means in said rabbet with two adjacent sides thereof substantiallyflush with the corresponding faces of said second means or on said firstdie means projecting from the plane surface with one side substantiallynormal thereto and a side adjacent said one side parallel to the planesurface and spaced by substantially the thickness of said sheet from theplane of said one rabbet surface, means for detachably mounting said barselectively on one of said die means, means on at least one of saidfirst and second die means for supporting therebetween in a planesubstantially normal to the planes of said plane surface and said firstface a metal sheet edge portion which measured from said plane surfaceto the adjacent sheet edge has a width substantially equal to saidheight, said bar when mounted in said rabbet cooperating with said planesurface to bend said edge portion into an upstanding flange of saidpredetermined height upon said die member movement and when mounted onsaid plane surface cooperating upon said die member movement with saidrabbet surfaces to bend the portion of the sheet adjacent said edgeportion to a position substantially normal to the edge portion and tothe body of the sheet to provide the upstanding portion of a rebentflange having said edge portion as the outturned portion, two pairs ofcutting elements selectively disposable on one of said die memberspositioned to have said sheet corner portion disposed adjacent theretoupon insertion of said sheet in the press, one of said pairs whendisposed on said die member presenting a pair of rectangularly relatedplane surfaces each parallel to said direction of movement and extendingin a plane parallel to the line of one of said adjacent edges andintersecting the line of the other edge, the projected planes of saidplane surfaces defining on the sheet a rectangular corner portion of anextent inward from each of said edges substantially equal to thecombined height and Width of said upstanding and outturned portionsrespectively of said rebent flanges, the other of said pairs of cuttingelements when disposed on said one die member presenting a pair ofaligned plane surfaces extending diagonally relative to said adjacentsheet edges, the projected planes of said diagonal plane surfacesdefining on the sheet a triangular corner portion of an extent alongeach of said edges substantially equal to twice said height, a pair ofdie blocks selectively securable on the other of said die members, oneof said die blocks having a pair of rectangularly related plane surfaceseach parallel to said direction of die member movement, said one dieblock being detachably sccurable on said other die member in a positionwith said' plane surfaces thereof respectively in shearing relation withthe plane surfaces of said one pair of cutting elements, the other dieblock having a plane surface parallel to said direction of movement,said other die block being detachably securable on said other die memberin a position with said plane surface thereof extending diagonallyrelative to said adjacent edges in shearing relation With said diagonalplane surfaces of the other pair of cutting elements, means fordetachably securing said cutting elements selectively on said one diemember, and means for detachably securing the die blocks on said otherdie member selectively in said respective positions thereof, wherebyprior to formation of rebent flanges on adjacent edges of the sheet thefirst cutting element pair may cooperate with said one die block toshear said square corner portion from the sheet, and prior to formationof upstanding flanges on said edges said other cutting element pair maycooperate with the other die block to shear said triangular cornerportion from the sheet.

7. In a press having complemental die members relatively movableopposedly into engaged relation for bend- 18 ing marginal portions ofadjacent edges of a metal sheet to provide thereon either upstandingflanges of predetermined height having at least one end inclined orrebent flanges each having an upstanding portion of substantially saidheight and an outturned portion extending from said upstanding portion adistance substantially equal to said height, and for cutting off acorner portion of the sheet between said adjacent edges prior to theforming of said flanges, first die means on a first of said die membershaving substantially parallel to the direction of said relative movementa plane surface of an extent in said direction at least equal to saidheight, second die means on the second die member having a plane faceparallel to the plane of said plane surface and spaced therefrom bysubstantially the thickness of said sheet, a dihedral rabbet defined insaid second die means by a pair of reetangularly related surfaces one ofwhich extends substantially parallel to said face and each having awidth substantially equal to said height, a die bar of a cross sectionproviding two adjacent sides corresponding to said rabbet surfaces and athird side parallel to one of said two sides, said bar being selectivelymounted either in said rabbet with said two adjacent sides thereofengaging the rabbet surfaces and said third side substantially flushwith said face of said second means or on said first die meansprojecting from the plane surface with one of said two sidessubstantially normal thereto and said third side parallel to the planesurface and spaced by substantially the thickness of said sheet from theplane of said one rabbet surface, means for detachably mounting said barselectively on one of said die means, means on at least one of saidfirst and second die means for supporting therebetween in a planesubstantially normal to the planes of said plane surface and said planeface a metal sheet edge portion which measured from said plane surfaceto the adjacent sheet edge has a width substantially equal to saidheight, said bar when mounted in said rabbet cooperating upon said diemember movement with said plane surface to bend said edge portion intoan upstanding flange of said predetermined height and when mounted onsaid plane surface cooperating with said rabbet surfaces upon said diemember movement to bend the portion of the sheet adjacent said edgeportion to a position substantially normal to the edge portion and tothe body of the sheet to provide the upstanding portion of a rebentflange having said edge portions as the outturned portion, two pairs ofcutting elements selectively disposable on one of said die memberspositioned to have said sheet corner disposed adjacent thereto uponinsertion of said sheet in the press, one of said pairs when disposed onsaid die member having the cutting elements thereof presenting a pair ofrectangularly related plane surfaces each parallel to the direction ofmovement of the die members and extending in a plane parallel to theline of one of said adjacent edges and intersecting the line of theother edge, the projected planes of said plane surfaces defining on thesheet a square corner portion of an extent inward from each of saidedges substantially equal to the combined height and width of saidupstanding and outturned portions respectively of said rebent flange,the other of said pairs of cutting elements when disposed on said onedie member having the cutting elements thereof presenting a pair ofaligned plane surfaces extending diagonally relative to said adjacentsheet edges, the projected planes of said diagonal plane surfacesdefining on the sheet a triangular corner portion of an extent alongeach of said edges substantially equal to twice said height, a pair ofdie blocks selectively securable on the other of said die members, oneof said die blocks having a pair of rectangularly related plane surfaceseach parallel to said direction of die member movement, said one dieblock being detachably securable on said other die member in a positionwith said plane surfaces thereof respectively in shearing relation withthe plane surfaces of said one pair of cutting elements, the other dieblock having a plane surface parallel to said direction of movement andbeing detachably securable on said other die member in a position withsaid plane surface thereof extending diagonally relative to saidadjacent edges in shearing relation with said diagonal plane surfaces ofthe other pair of cutting elements, means for detachably securing saidcutting elements selec tively on said one die member, and means fordetachably securing the die blocks on said other die member selectivelyin said respective positions thereof, whereby preliminary to formationof rebent flanges on adjacent edges of the sheet the first cuttingelement pair may cooperate with said one die block to shear said squarecorner portion from the sheet, and prior to formation of upstandingflanges on said edges said other cutting element pair may cooperate withthe other die block to shear said triangular corner portion from thesheet.

8. Structure substantially as defined in claim 7, in which each of thecutting elements of said one pair is spaced from said plane surface ofthe other cutting element thereof, and including a shear strip having aplane face flush with the plane surface of one of said cutting elementsof the one pair and of appreciably less extent in said direction ofmovement and extending from said one element at least to the plane ofsaid plane surface of said other cutting element.

9. In a press for cutting off corner portions of a sheet and cutting asubstantially rectangular opening in the sheet in the forming of a panelfrom the sheet and having complementary die members relatively movableopposedly into engaged relation to effect said cutting of a sheetdisposed therebetween, first shear die means on a first of said diemembers corresponding in outline to the opening to be cut, second sheardie means on the second of said die members, said first and second sheardie means being arranged for close-fitting telescoping movement to outsaid sheet upon movement of the die members relatively toward eachother, two pairs of cutting elements selectively mountable on one of thedie members in position to have disposed adjacent thereto a sheet cornerdefined by adjacent edges of the sheet, one of said pairs when mountedon the die member having the cutting elements presenting a pair ofrectangular related cutting surfaces each parallel to the direction ofmovement of the die members and extending in a plane parallel to theline of one of said adjacent edges of the sheet and intersecting theline of the other edge, the projected planes of said surfaces definingon the sheet a square corner portion, the other pair of cutting elementswhen mounted on the die member having the cutting elements presenting apair of aligned cutting surfaces extending diagonally relative to saidsheet corner, the projected planes of said diagonal cutting surfacesdefining on the sheet a triangular corner portion, a pair of cutting dieblocks selectively securable on the other of said die members, one ofsaid die blocks having a pair of rectangularly related plane surfaceseach parallel to said direction of die member movement and extendingtransversely of one of said adjacent sheet edges, the other of said dieblocks having a plane surface parallel to said direction of movement andextending diagonally relative to said adjacent sheet edges, said one dieblock being detachably securable on said other die member in positionwith said plane surfaces thereof respectively in shearing relation withthe cutting surfaces of said one pair of cutting elements, said otherdie block being detachably securable on the other die member with saidplane surface thereof in shearing relation with said diagonal cuttingsurfaces of the other pair of cutting elements, means for detachablysecuring said cutting elements selectively on said one die member, meansfor detachably securing said die blocks selectively on said other diemember, a third pair of cutting elements secured on said one die memberpresenting a pair of rectangularly related cutting surfaces parallel tosaid direction of movement and each extendmg in a plane parallel to theline of one edge of the sheet and intersecting the line of anintersecting edge, the projected planes of said cutting surfaces of saidthird pair of elements defining on the sheet a rectangular cornerportion, and a third die block secured on said other die member having apair of rectangularly related plane surfaces each parallel to saiddirection of movement and in shearing relation with one of the cuttingsurfaces of the third pair of cutting elements.

10. In a press for cutting off corner portions of a sheet and cutting asubstantially rectangular opening in the sheet in the forming of a panelfrom the sheet and having complementary die members relatively movableopposedly into engaged relation to effect said cutting of a sheetdisposed therebetween, first shear die means on a first of said diemembers corresponding in outline to the opening to be cut, second sheardie means on the second of said die members, said first and second sheardie means being arranged for close-fitting telescoping movement to cutsaid sheet upon movement of the die members relatively toward eachother, two pairs of cutting elements selectively mountable on one of thedie members in position to have disposed adjacent thereto a sheet cornerdefined by adjacent edges of the sheet, one of said pairs when mountedon the die member having the cutting elements presenting a pair ofrectangularly related cutting surfaces each parallel to the direction ofmovement of the die members and extending in a plane parallel to theline of one of said adjacent edges of the sheet and intersecting theline of the other edge, the projected planes of said surfaces definingon the sheet a square corner portion, the other pair of cutting elementswhen mounted on the die member having the cutting elements presenting apair of aligned cutting surfaces extending diagonally relative to saidsheet corner, the projected planes of said diagonal cutting surfacesdefining on the sheet a triangular corner portion, a pair of cutting dieblocks selectively securable on the other of said die members, one ofsaid die blocks having a pair of rectangularly related plane surfaceseach parallel to said direction of die member movement and extendingtransversely of one of said adjacent sheet edges, the other of said dieblocks having a plane surface parallel to said direction of movement andextending diagonally relative to said adjacent sheet edges, said one dieblock being detachably securable on said other die member in positionwith said plane surfaces thereof respectively in shearing relation withthe plane surfaces of said one pair of cutting elements, said other dieblock being detachably securable on the other die member with said planesurface thereof in shearing relation with said diagonal plane surfacesof the other pair of cutting elements, means for detachably securingsaid cutting elements selectively on said one die member, and means fordetachably securing said die blocks selectively on said other diemember.

11. Structure substantially as defined in claim 9, in which at least oneof the cutting elements of said one pair and third pair is spaced fromsaid plane surface of the other die element of the pair and includes ashear strip having a plane face flush with the plane surface of said onecutting element and of appreciably less extent in said direction ofmovement and extending from said one element at least to the plane ofthe plane surface of the other cutting element of the pair.

12. In a press having complemental die members relatively movableopposedly into engaged relation for bending a marginal portion of ametal sheet to provide thereon either an upstanding flange ofpredetermined height or a rebent flange having an upstanding portion ofsubstantially said height and an outturned portion extending from saidupstanding portion a distance substantially equal to said height, firstdie means on one of said die members having substantially parallel tothe direction of said relative movement a plane surface of an extent insaid direction at least equal to said height, second die means on theother die member having a first plane face parallel to the plane of saidplane surface and spaced therefrom by substantially the thickness ofsaid sheet and also having a second plane face normal to said firstface, said second die means having therein a dihedral rabbet defined bya pair of rectangularly related surfaces each extending substantiallyparallel to one of said faces and having a width substantially equal tosaid height, a die bar of substantially square cross section each sideof which has a width substantially equal to said height, said bar beingselectively mounted on said second die means in said rabbet with twoadjacent sides thereof substantially flush with the corresponding facesof said second die means or on said first die means projecting from theplane surface with one side substantially normal thereto and a sideadjacent said one side parallel to the plane surface and spaced bysubstantially the thickness of said sheet from the plane of the rabbetsurface parallel to said first face of the second die means, means fordetachably mounting said bar selectively on one of said die means, andmeans on at least one of said first and second die means for supportingtherebetween in a plane substantially normal to the planes of said planesurface and said first face a metal sheet edge portion which measuredfrom said plane surface to the adjacent sheet edge has a widthsubstantially equal to said height, said bar when mounted in said rabbetcooperating with said plane surface upon said die member movement tobend said edge portion into an upstanding flange of said predeterminedheight and when mounted on said plane surface cooperating with saidrabbet-defining surfaces upon said die member movement to bend theportion of the sheet adjacent said edge portion to a positionsubstantially normal to the edge portion and to the body of the sheet toprovide the upstanding portion of a rebent flange having said edgeportion as the outturned portion.

13. In a press having complemental die members relatively movableopposedly into engaged relation for bending a marginal portion of ametal sheet to provide thereon either an upstanding flange ofpredetermined height or a rebent flange having an upstanding portion ofsubstantially said height and an outturned portion extending from saidupstanding portion a distance substantially equal to said height, firstdie means on one of said die members having substantially parallel tothe direction of said relative movement a plane surface of an extent insaid direction at least equal to said height, second die means on theother die member having a plane face parallel to the plane of said planesurface and spaced therefrom by substantially the thickness of saidsheet, a dihedral rabbet defined in said second die means by a pair ofrectangularly related surfaces with one thereof extending substantiallyparallel to said face and each having a width substantially equal tosaid height, a die bar of a cross section providing two adjacent sidesrectangularly related and corresponding in width to said rabbet surfacesand a third side parallel to one of said two sides, said bar beingselectively mounted either on said second die means in said rabbet withsaid two adjacent sides thereof engaging on the rabbet surfaces and saidthird side sub stantially flush With said plane face of said second diemeans or on said first die means projecting from the plane surface withone of said two adjacent sides engaging thereon and the othersubstantially normal thereto and said third side disposed parallel tothe plane surface and spaced by substantially the thickness of saidsheet from the plane of the rabbet surface parallel to said plane faceof the second die means, means for detachably mounting said barselectively on one of said die means, and means on at least one of saidfirst and second die means for supporting therebetween in a planesubstantially normal to the planes of said plane surface and said firstface a metal sheet edge portion which measured from said plane surfaceto the adjacent sheet edge has a Width substantially equal to saidheight, said die bar when mounted in said rabbet cooperating with saidplane surface upon said die member movement to bend said edge portioninto an upstanding flange of said predetermined height and when mountedon said plane surface cooperating with said rabbet-defining surfacesupon said die member movement to bend the portion of the sheet adjacentsaid edge portion to a position substantially normal to the edge portionand to the body of the sheet to provide the upstanding portion of arebent flange having said edge portion as the outturned portion.

14. In a press for cutting a sub-stantially rectangular opening in ametal sheet and having complementary opposed die carriers relativelymovable perpendicularly of each other into engaged relation to effectsaid cutting, rectangular first die means on one of said die carrierscorresponding in outline to the opening to be cut and affording supportfor a metal sheet inwardly from said outline, and second die means onthe other of said die carriers rectangularly arranged to receivetherewithin in close-fitting slidable relation said first die meanswhereby to out said sheet upon relative engaging movement of the diecarriers with said sheet therebetween, said second die means comprisingfour cutting elements each extending along one side of a rectanglecorresponding to a side of the opening, each of said elements having aslightly curved cutting edge for cutting through the sheet with aprogressive shearing action to define one side of the opening.

15. In a press for cutting a substantially rectangular opening in ametal sheet and having complementary opposed die carriers relativelymovable perpendicularly of each other into engaged relation to effectsaid cutting, rectangular first die means on one of said die carrierscorresponding in outline to the opening to be cut and affording supportfor a metal sheet inwardly from said outline, rectangular second diemeans on the other of said die carriers; said first and second die meansbeing arranged to telescope in close-fitting slidable relation wherebyto out said sheet upon relative engaging movement of the die carrierswith said sheet therebetween, at least one of said die means comprisingfour cutting elements each extending along one side of a rectanglecorresponding to a side of the opening, and at least one of saidelements having a slightly curved cutting edge for cutting through thesheet with a progressive shearing action to define one side of theopening.

16. In a press having complemental die members relatively movableopposedly into engaged relation for bending portions of adjacent edgesof a rectangular metal sheet to provide thereon either upstandingflanges having inclined angled ends or rebent flanges each having anupstanding portion and an outturned portion, means for cutting off acorner of the sheet between said adjacent edges preliminarily to theforming of said flanges, said means comprising two pairs of die elementsselectively disposable on one of said die members positioned to havesaid sheet corner disposed adjacent thereto upon insertion of said sheetin the press, one of said pairs when disposed on said one die memberhaving the die elements thereof presenting a pair of rectangularlyrelated plane surfaces each parallel to the direction of movement of thedie members and extending in a plane parallel to the line of one of saidadjacent edges and intersecting the line of the other adjacent edge, theprojected planes of said plane surfaces defining on the sheet arectangular corner portion of an extent inward from each of said edgessubstantially equal to the combined height and width of said upstandingand outturned portions respectively of said rebent flange, the other ofsaid pairs of die elements when isposed on said one die member havingthe die elements thereof presenting a pair of aligned plane surfacesextending diagonally relative to said adjacent sheet edges, theprojected planes of said diagonal plane surfaces defining on the sheet atriangular corner portion of an extent along each of said edgessubstantially equal to twice the height of said upstanding flanges, adie block on the other of said die members having a pair ofrectangularly extending plane surfaces each parallel to said directionof die memher movement and of at least said corner portion extent, saiddie block being detachably securable on said other die memberselectively either in one position with said plane surfaces thereofrespectively in shearing relation with the plane surfaces of said onepair of die elements or in a second position with one of said planesurfaces thereof extending diagonally relative to said adjacent sheetedges in shearing relation with said diagonal plane surfaces of the dieelements of said other pair, means for detachably securing said dieelements on said one die member, and means for detachably securing thedie block on said other die member selectively in one of said positions,whereby preliminary to formation of rebent flanges on adjacent edges ofa sheet said surfaces of said one die element pair may cooperate withsaid die block surfaces to shear said rectangular corner portion fromthe sheet upon said relative die member movement with the die blocksecured in said first position, and preliminary to formation ofupstanding flanges on adjacent sheet edges said surfaces of said otherdie element pair may cooperate with said one diagonally extending dieblock surface to shear said triangular corner portion from the sheetupon said relative die member movement with said die block secured insaid second position thereof.

17. In a press having complemental die members relatively movableopposedly into engaged relation for bending portions of adjacent edgesof a rectangular metal sheet to provide thereon either upstandingflanges having inclined angled ends or rebent flanges each having anupstanding portion and an outturned portion, means for cutting off acorner of the sheet between said adjacent edges preliminarily to theforming of said flanges, said means comprising two pairs of die elementsselectively disposable on one of said die members positioned to havesaid sheet corner disposed adjacent thereto upon insertion of said sheetin the press, one of said pairs when disposed on said one die memberpresenting a pair of rectangularly related plane surfaces each parallelto the direction of movement of the die members and extending in a planeparallel to the line of one of said adjacent edges and intersecting theline of the other adjacent edge, the projected planes of said planesurfaces defining on the sheet a square corner portion of an extentinward from each of said edges substantially equal to the combinedheight and width of said upstanding and outturned portions respectivelyof said rebent flange, the other of said pairs of die elements whendisposed on said one die member presenting a pair of aligned planesurfaces extending diagonally relative to said adjacent sheet edges, theprojected planes of said diagonal plane surfaces defining on the sheet atriangular corner portion of an extent along each of said edgessubstantially equal to twice the height of said upstanding flanges, apair of die blocks selectively securable on the other of said diemembers, one of said die block having a pair of rectangularly extendingplane surfaces each parallel to said direction of die member movementand of at least said corner portion extent, said one die block beingdetachably securable on said other die member in a position with saidplane surfaces thereof respectively in shearing relation with therectanguiarly related plane surfaces of said one pair of die elements,the other of said die blocks having a plane surface parallel to saiddirection of movement and extending diagonally relative to said adjacentedges with the plane thereof defining with said edges a trianglecorresponding to said triangular corner portion, said other die blockbeing detachably securable on said other die member in a position withsaid diagonally extending surface thereof disposed in shearing relationwith said diagonal plane surfaces of the die elements of said otherpair, means for detachably securing said die elements on said one diemember, and means for detachably securing the die blocks on said otherdie member selectively in the respective positions thereof, wherebypreliminary to formation of rebent flanges on adjacent edges of a sheetsaid surfaces of said one die element pair may cooperate with saidsurfaces of said one die block to shear said square corner portion fromthe sheet upon said relative die member movement, and preliminary toformation of upstanding flanges on adjacent sheet edges said diagonalsurfaces of said other die element pair may cooperate with saiddiagonally extending surface of said other die block to shear saidtriangular corner portion from the sheet upon said relative die membermovement.

18. Structure substantially as defined in claim 17, in which each ofsaid die elements of said one pair is spaced from said plane surface ofthe other die element of the pair, and including a shear stripassociated with each of said die elements of appreciably less extent insaid direction of movement than said die elements and having a planeface flush with said plane surface of the associated die element andextending from the associated die element to the plane of said planesurface of the other die element.

19. In a press for forming sheets into assemblable panels of twodiffering complemental shapes each including an eccentrically locatedaperture and requiring relative reversal for assembly thereof andregister of the apertures, die structure for forming both shapes ofpanels including alternative die parts for selective incorporationtherein in accordancerzith the shape of panel to be formed, said diestructure comprising a pair of die carriers relatively movable towardeach other into engaged relation to form a sheet therebetween into apanel, first shear die means on one of said carriers locatedeccentrically of the panel and defining an outline corresponding to thatof 'an aperture to be cut in the panel, second shear die means on theother carrier, said first and second shear die means being arranged forclosefitting telescoping cooperation to out said aperture in I the panelupon movement of the die carriers into engaged relation, a panel ejectormember movable between and in the same plane as said die carriers forengagement with a formed panel to support such panel clear of the diecarriers, said ejector member corresponding generally in dimensions andshape to the panel and having an opening located eccentrically thereofaccommodating the shear die means therein, means for guiding the ejectormember for movement in said plane including elongated means extendingsubstantially normal to one face of the ejector member, means fordetachably securing said elongated means selectively to either face ofthe ejector member to permit face-for-face reversal thereof forreversing the location of said opening relative to the center of theejector member, and means removably attaching said shear die means tothe respective die carriers within the outline of said openingselectively at said eccentric location or said reversed locationthereof.

20. In a press for forming two assemblable panels of differingcomplemental shapes each including an eccentrically located formationand requiring relative reversal for assembly thereof and registration ofsaid formation, die structure for forming both shapes of panelsincluding alternative die parts for selective incorporation therein inaccordance with the shape of panel to be formed, said die structurecomprising a pair of die carriers relatively movable toward each otherinto engaged relation to form a panel therebetween, first and second diemeans respectively on one and the other of said carriers locatedeccentrically of the panel and arranged for telescoping cooperation todefine said formation in the panel upon movement of the die carriersinto engaged relation, a panel ejector member movable between and in thesame plane as said die carriers for engagement with a formed panel tosupport such panel clear of the die carriers, said ejector membercorresponding generally in dimensions and shape to the panel and havingan opening located eccentrically thereof accommodating said die meanstherethrough, means for guiding the ejector member for movement in saidplane including elongated means extending substantially normal to oneface of the ejector member,

means for detachably securing said elongated means selectively to eitherface of the ejector member to permit face-for-face reversal thereof forreversing the location of said opening relative to the center of theejector memher, and means removably attaching said die means to therespective die carriers Within the outline of said formation selectivelyat said eccentric location or said reversed location thereof.

References Cited in the file of this patent UNITED STATES PATENTS BowersIan. 14, 1873 McGregor Nov. 4, 1930 MacMillin et a] July 14, 1942Gundlach July 17, 1956

